code: def explain(self, deployment_name=None, df=None, endpoint=None):
      return "1"
  
file_path: mlflow/tests/resources/mlflow-test-plugin/mlflow_test_plugin/fake_deployment_plugin.py
imports: import os
  from mlflow.deployments import BaseDeploymentClient, PredictionsResponse
label_desc: Use image node_id 7 for calling the PluginDeploymentClient obj's underlying member method code with example usage: obj.explain(deployment_name, df, endpoint) and returns: str